Ampeg brothers: During our last practice, my PF500 started to get that about to fry smell ,and started to cut out. I’m running with a GK NEO 410 cab, volume & gain each about 1:00 to be heard among the guitars. Fan was running and after a little time out, it seemed ok. I can’t imagine one o’clock on the dials could be pushing it that hard; time to be concerned??